Mounting bracket and raptor perch guard

ABSTRACT

The present invention is directed towards a self-closing bracket ( 20 ) for use in mounting an object, such as a perch guard, on elevated structures, such as power lines. The self-closing bracket ( 20 ) has an upper member ( 24 ) and a lower member ( 28 ). The lower member ( 28 ) is rotatably connected to the upper member ( 24 ) and has a closure member ( 60 ) that extends into the interior of the bracket ( 20 ) when the bracket ( 20 ) is in an open position. As the bracket ( 20 ) is moved towards the object to be clamped, the lower member ( 28 ) pivots relative to the upper member ( 24 ) as the closure member ( 60 ) engages the object to be clamped, thereby urging the bracket ( 20 ) to an at least partially closed position.

CROSS REFERENCE TO RELATED APPLICATIONS

The present application claims priority under 35 U.S.C. §119(e) fromU.S. Provisional Patent Application Serial No. 60/077,746, filed Mar.12, 1998, and U.S. Provisional Patent Application Serial No. 60/104,630,filed Oct. 15, 1998.

FIELD OF THE INVENTION

The present invention relates generally to devices for mounting objectson structures for supporting utility lines and specifically to a bracketfor mounting objects, such as a raptor perch guard, on structures forsupporting power lines.

BACKGROUND OF THE INVENTION

Each year, hundreds of raptors and other large birds worldwide, many ofwhich are endangered, are electrocuted by power lines. The birds areattracted to elevated structures supporting the power lines as locationsto perch on during their search for prey. Many countries now requireperch guards to be employed on power poles to discourage raptors andother large birds from landing on the poles and/or prevent them fromcontacting exposed power components. Such perch guard systems typicallyemploy one or more electrically insulative structural members located onthe cross-arms of the poles to obstruct access of large birds to thecross-arms.

Existing perch guard systems can have many problems. Perch guard systemscan be relatively complicated and difficult to use and install. They canbe relatively heavy and have numerous parts that must be interconnectedby the user prior to installation on the power pole. Existing attachmentsystems for engaging the perch guards with the poles can be difficultand time consuming for personnel to engage with the cross-arms,especially on high power poles. Attachment systems commonly requiretwo-handed operation and are therefore difficult to install with ahotstick. As will be appreciated, a hotstick is a long pole composed ofan electrically insulating material such as fiberglass having a toolsuch as a socket wrench mounted on one end of the pole. Some perchguards are fiberglass and readily splinter during installation, creatinga health hazard for personnel. They can require power to be shut offduring installation, thereby causing power outages for customers. Theycan degrade rapidly outdoors due to the combination of sunlight andadverse weather conditions and require relatively frequent replacement.Finally, they can be relatively heavy and/or expensive.

SUMMARY OF THE INVENTION

It is an object of the present invention to provide a perch guard andattachment system that is lightweight and simple to use and install, donot splinter during installation, can be installed without shutting downpower, have relatively long service lives in outdoor applications, arerelatively inexpensive, and can be quickly and easily installed with ahotstick.

One aspect of the present invention is directed to a bracket formounting objects on an elevated structure supporting a line fortransmitting electrical energy. The bracket includes:

(a) first and second members connected by a hinge member and

(b) a fastener for engaging the members. At least one of the members isconnected to a closure member for engaging the elevated structure. Asthe bracket is moved towards the elevated structure, the closure memberengages the elevated structure and at least partially closes the bracketto permit the fastener to engage the first and second members. When thebracket is open, the closure member preferably extends interiorly of thebracket below an upper surface of the upper member to permit the closuremember to engage the elevated structure and thereby close the bracket.

In one bracket configuration, the closure member is connected only to abottom member and not to the upper member. Stated another way, theclosure member is discrete from the upper member. This configurationpermits the closure member to move the bottom member independently ofthe upper member.

The fastener can be any suitable fastening device, with a threaded boltbeing most preferred.

The bracket is relatively simple to operate. Mounting of the bracket onthe utility structure includes the following steps:

(a) opening the bracket;

(b) moving a member of the opened bracket towards a structural member ofthe elevated structure;

(c) engaging the closure member, which is commonly connected to theother member of the opened bracket, with the structural member to atleast partially close the opposing distal ends of the opened bracket;and

(d) fastening the distal ends of the two members after the closuremember is engaged with the structural member.

The bracket has a number of benefits particularly in utilityapplications. The bracket is relatively lightweight and simple to useand install. It can be mounted on a structural member of a power pole,telephone pole, and the like in a matter of minutes using a hotstick.Because the bracket is readily employable using a hotstick, power can betransmitted by the lines during employment of the bracket. The bracketcan be relatively inexpensive and easy to manufacture due to itsrelatively simple design.

Another aspect of the present invention provides a perch guard that isreadily mounted on a utility structure using the bracket. As will beappreciated, a perch guard limits the wingspan of a bird standing on theelevated structure. The perch guard preferably includes a plurality oftubular members that are composed of a UV-resistant, weather-resistant(e.g., non-corrosive), lightweight, and electrically insulativematerial. Preferably, the material is selected from the group consistingof polyvinyl chloride, fiberglass, wood, polypropylene and all forms andtypes of plastics and composites thereof. The perch guard can have arelatively long service life due to the use of such materials and berelatively inexpensive. Because the guard can be manufactured fromplastics instead of fiberglass, it can be nonsplintering duringinstallation.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a front view of an embodiment of a bracket according to thepresent invention;

FIG. 2 is a right side view taken from another side of the bracket ofFIG. 1;

FIG. 3 is a upper view of the bracket of FIG. 1;

FIG. 4 is another front view of the bracket of FIG. 1;

FIG. 5 is another right side view of the bracket of FIG. 1;

FIG. 6 is another upper view of the bracket of FIG. 1;

FIG. 7 is a view of the bracket of FIG. 1 when engaged with a structuralmember of a utility structure;

FIG. 8 is a front view of a bracket according to another embodiment ofthe present invention;

FIG. 9 is a right side view of the bracket of FIG. 8;

FIG. 10 is a upper view of the bracket of FIG. 8;

FIG. 11 depicts the bracket of FIG. 8 in an open position, beforeengagement with a structural member;

FIG. 12 depicts the bracket of FIG. 8 during engagement with thestructural member;

FIG. 13 depicts the bracket of FIG. 8 after engagement with thestructural member;

FIGS. 14 and 15 depict the bracket of FIG. 1 engaged with a perch guard;

FIG. 16 depicts the bracket of FIG. 8 engaged with a perch guard;

FIGS. 17 and 18 depict differing configurations of perch guardsaccording to the present invention;

FIG. 19 depicts tubular members of a perch guard;

FIG. 20 depicts the side view of a tubular member;

FIG. 21 depicts another perch guard configuration;

FIG. 22 is a side view of another embodiment of a bracket according tothe present invention;

FIG. 23 is a front view of the bracket of FIG. 22;

FIG. 24 is a upper view of the bracket of FIG. 22;

FIG. 25 is a rear view of the bracket of FIG. 22;

FIG. 26 is a view of the detached lower hinged member of the bracket ofFIG. 22;

FIGS. 27-28 are side and front views respectively of another embodimentof a bracket; and

FIG. 29A is rear view of the upper member of the bracket; and

FIG. 29B is a rear view of the lower member of the bracket.

DETAILED DESCRIPTION

A first embodiment of a self-closing bracket according to a first aspectof the present invention is depicted in FIGS. 1-7. The bracket 20includes an upper member 24 and a lower member 28 connected by a hinge32. The upper and lower members 24 and 28 rotate about the hinge 32 topermit the distal ends 36 and 40 to open and close. As will beappreciated, the hinge 32 can be replaced by any suitable attachmentdevice. In this manner, the bracket can be clamped about an object, suchas a cross-arm on a utility pole. The bracket is preferably composed ofa UV-resistant, lightweight, and weather-resistant material such asstainless steel, poly(vinyl chloride), galvanized metals, all forms andtypes of plastics and the like.

A fastener 44 includes a threaded member 48 connected to the uppermember 24, such as by welding, and a rotatable threaded nut 52 thatscrews onto the threaded member 48. As will be appreciated, the fastenercan be any suitable fastening system, including a clip, cam latch, hoodlatch, over center latch and the like.

The lower member 28 is slotted to permit the threaded member 48 to passthrough the slot 56. The width of the slot 56 is larger than the widthof the threaded member 48 but less than the width of the nut 52 topermit the nut 52 to engage the lower member 28.

The process for opening and closing the bracket is relativelystraightforward. By screwing the nut upwardly relative to the threadedmember, the nut engages the lower member and moves the distal end of thelower member closer to the distal end of the upper member. Conversely,by screwing the nut downwardly relative to the threaded member, the nutmoves away from the upper member and thereby lowers the distal end ofthe lower member away from the distal end of the upper member.

The bracket further includes a closure member 60 attached to the lowermember 28 and preferably not to the upper member 24. The tip 64 of theclosure member 60 extends below the upper surface 68 of the upper member24 when the bracket is open. In other words, the closure member 60 islocated interiorly of the longitudinal axis of the hinge while a lowerportion of the lower member 28 is located exteriorly of the longitudinalaxis of the hinge. The closure member 60 engages the structural memberduring positioning of the bracket over the structural member and movesthe distal end of the lower member 28 closer to the distal end of theupper member 24, thereby causing the slotted portion of the lower member28 to receive the threaded member 48 so that the nut 52 can move thelower member into a closed position. Stated another way, the structuralmember contacts the closure member and as the upper member of thebracket moves closer to the upper surface of the structural member theclosure member (and lower member) is rotated into a more verticalorientation, with the tip of the closure member being closer to theupper member. After rotation and full engagement of the bracket with thestructural member, the plane of the closure member is substantiallyaligned with (substantially parallel to) the adjacent portions of theupper member.

The bracket can further include devices, such as screws 72 a,b formounting objects, such as a perch guard, on the bracket. As explained indetail below, FIG. 14 depicts the bracket engaging a plurality ofmembers defining a perch guard.

Another embodiment of a bracket according to the present invention isdepicted in FIGS. 8-13. The bracket 100 is the same as the bracket 20except that the interior surfaces of the upper and lower members 102 and103 are shaped differently to accommodate a structural member 104 thathas a different shape than the structural member 90 of FIG. 7 and thebracket 100 includes a projection 73 that is received in a suitablysized and shaped recess or hole (not shown) in the structural member toprovide lateral stability (i.e., inhibit slipping and sliding) of thebracket on the structural member. As will be appreciated, the shape ofthe interior surface commonly has the same shape as the exterior surfaceof the structural member.

The operation of the bracket is relatively straightforward. As shown inFIGS. 11-13, the bracket 100 is opened and placed over the structuralmember 104 (FIG. 11) typically using a hotstick. As the bracket 100engages the structural member 104, the tip 64 of the closure member 60engages the upper surface 108 of the structural member 104 and causesthe distal ends 112 and 116 of the bracket to move (e.g., rotate)towards one another. The distances between the distal ends and betweenthe closure member and hinged rear surface of the upper memberprogressively decrease as the upper surface of the bracket 100 movescloser to the upper surface of the structural member 104 (FIG. 8). Whenthe bracket is resting on upper of the structural member 104, theclosure member 60 has caused the distal ends 112 and 116 to move closeenough together for the threaded member 48 to be received in the slot 56of the slotted portion (FIG. 13). The nut can then be moved clockwise(or tightened) using the hotstick to force the lower member 103 andupper member 102 of the bracket against the structural member 104.

The bracket is operated easily by a hotstick. Accordingly, thetransmission of power by the wires supported by the structural memberdoes not need to be interrupted during installation of the bracket onthe utility structure.

FIGS. 15-20 depict a perch guard 200 according to a second aspect of thepresent invention. In FIGS. 17-20, the perch guard is depicted withoutthe bracket of the previous aspect of the invention. As can be seen fromFIG. 17, the interconnected tubular members 204 a prevent a bird fromextending its wingspan to contact adjacent insulators 208 a,b. In thismanner, the bird is not electrocuted. The tubular members are composedpreferably of a UV-resistant and weather-resistant material, such aspoly(vinyl chloride), fiberglass, wood, polypropylene, all forms andtypes of plastics and the like.

FIGS. 14 and 15 depict a number of interconnected tubular members 204a-c mounted on the bracket 20 of the first aspect of the invention. Thebolts 72 a and 72 b penetrate (pass through) the lower member of theperch guard and hold it in position. As will be appreciated, anysuitable attachment device may be used to attach the perch guard to thebracket, such as a clamp, and the like.

FIG. 21 depicts another perch guard configuration. The members 300 a-care formed by a continuous length of tubular member formed preferablyfrom a plastic such as polylvinyl chloride) that has been deformed intoa series of bends 308 a-c and straight sections to define a triangle.The free ends 304 a,b of the perch guard 316 are preferably connectedwith cement via a tubular coupling 312 that telescopically receives thefree ends 304 a,b.

Another embodiment of a bracket for mounting a perch guard is depictedin FIGS. 22-26. The bracket 200 includes a hinged upper member 204 and ahinged lower member 208 connected by the hinge pin 212. The closuremember 218 on the inside of the lower member 208 has the same functionof engaging the crossarm as the closure member 60 noted above tofacilitate closing of the bracket about the crossarm. The backside 222of the closure member 218 is in a nested relationship with the recessedmember 226 on the upper member 204 to permit the lower member 208 toclose fully when an object such as a crossarm is received in the bracket200. When the bracket closes, the backside 222 of the lower member isreceived in the recessed member 226. The upper surface 230 of the uppermember 204 includes two interconnected passages 234 a,b which engage theends of a perch guard. For structural support, the lower member 208includes a plurality of gussets 246. As can be seen from FIG. 24, thegussets on the backside 222 of the closure member 218 are received insimilarly shaped recesses on the recessed member 226. The bracket 200can be fabricated from any suitable material with UV-resistant plasticbeing more preferred for reasons of cost. The perch guard can also befabricated from any suitable material with UV resistant electricalconduit being more preferred.

Referring to FIG. 22, when the bracket is opened (and before the closuremember is engaged with the structural member), the closure member 60forms a first angle ⊖ with the vertical axis 61 and, when the bracket isengaged with the structural member, the closure member forms a secondangle ⊖ (not shown) with the vertical axis 61. The first angle is morethan the second angle.

Yet another embodiment of a bracket is depicted in FIGS. 27-28 and 29Aand 29B. The bracket 400 has upper and lower members 404, 408 connectedby a hinge member 412. The lower member 408 has a closure member 416that extends upwardly above the hinge member 412 and is received in aslot 420 in the upper member 404 when the bracket is fully closed. Inall other respects the operation of the bracket is substantially thesame as the brackets described above.

The foregoing description of the present invention has been presentedfor purposes of illustration and description. Furthermore, thedescription is not intended to limit the invention to the form disclosedherein. Consequently, variations and modifications commensurate with theabove teachings, and the skill or knowledge of the relevant art, arewithin the scope of the present invention. The embodiments describedhereinabove are further intended to explain best modes known forpracticing the invention and to enable others skilled in the art toutilize the invention in such, or other, embodiments and with variousmodifications required by the particular applications or uses of thepresent invention. It is intended that the appended claims be construedto include alternative embodiments to the extent permitted by the priorart.

What is claimed is:
 1. A bracket for mounting on an elevated structuresupporting a line for transmitting electrical energy, comprising: anupper member and a bottom member connected by a hinge member and afastener for engaging the upper and bottom members, the upper and bottommembers being axially aligned when the bracket is open, wherein at leastone of the upper and bottom members is connected to a closure member forengaging the elevated structure such that, when the bracket is movedtowards the elevated structure, the closure member engages the elevatedstructure and at least partially closes the bracket to permit thefastener to engage the other of the at least one of the upper and bottommembers.
 2. The bracket of claim 1, wherein, when the bracket is open,the closure member extends below an upper surface of the upper member.3. The bracket of claim 1, wherein the closure member is connected tothe bottom member and is positioned in a central portion of the at leastone of the upper and bottom members.
 4. The bracket of claim 1, whereinthe closure member is discrete from the upper member and is in nestedrelationship with the upper member when the bracket is closed.
 5. Thebracket of claim 1, wherein the fastener is attached to the bottommember and received in a slot in the upper member.
 6. The bracket ofclaim 1, wherein the bracket is connected to device for limiting awingspan of a bird standing on the elevated structure, the device forlimiting a wingspan including a plurality of tubular members.
 7. Thebracket of claim 6, wherein the closure member is part of the bottommember and engages the upper member after closure of the bracket.
 8. Thebracket of claim 7, wherein the axial alignment of the bottom and uppermembers is the same whether the bracket is in the open position or theclosed position.
 9. The bracket of claim 1, wherein a rear surface ofthe upper member is adjacent and connected to the hinge member andwherein in a first mode the bracket is open and in a second mode thebracket is closed and wherein in the first mode a free end of theclosure member and the rear surface of the upper member are separated bya first distance and in the second mode the free end of the closuremember and the rear surface of the upper member are separated by asecond distance and the first distance is more than the second distance.10. The bracket of claim 1, wherein, when the bracket is closed, a planedefined by a front or rear surface of the closure member issubstantially parallel to a plane defined by a front or rear surface ofan adjacent portion of the upper member.
 11. The bracket of claim 1,wherein, when the bracket is open, the closure member forms a firstangle relative to the vertical and when the bracket is closed theclosure member forms a second angle relative to the vertical and whereinthe first angle is more than the second angle.
 12. The bracket of claim1, wherein the closure member and a lower portion of the lower memberare located on opposing sides of the hinge member.
 13. A bracket formounting on an elevated structure supporting a line for transmittingelectrical energy, comprising: opposing first and second membersrotatably connected by a hinge; a closure member engaging at least oneof the first and second members; and a fastener for engaging the firstand second members, and moving each of the first and second memberscloser to a member of the elevated structure, the fastener and hingebeing located on opposing sides of the bracket, wherein, when thebracket is moved towards the member of the elevated structure to beengaged by the bracket, the closure member engages the member and atleast partially closes a space between free ends of the first and secondmembers to permit the fastener to engage the other of the at least oneof the first and second members.
 14. The bracket of claim 13, wherein,when the bracket is open, the closure member extends into the interiorof the bracket and the first and second members are axially aligned. 15.The bracket of claim 14, wherein, when the bracket is closed, theclosure member is in a nested relationship with at least one of thefirst and second members.
 16. A method for mounting a bracket on anelevated structure supporting a line for transmitting electrical energy,comprising: moving a first member of an opened bracket towards astructural member of the elevated structure, wherein the first memberand a second member have substantially the same orientation relative toone another whether the bracket is opened or closed; engaging a closuremember with the structural member to at least partially close the openedbracket by moving the first member and second member closer together;and fastening the first member to the second member after the closuremember is engaged with the structural member.
 17. The method of claim16, wherein electrical energy is passing through the line during each ofthe recited steps.
 18. The method of claim 16, wherein the closuremember is connected to the second member of the opened bracket and thefirst member and second member are aligned axially.
 19. The method ofclaim 16, wherein the first member and the second member are rotatablyinterconnected by a hinge member and the first member and second memberare in a face-to-face relationship when the bracket is opened andclosed.
 20. The method of claim 16, wherein the first member and secondmember are rotatably interconnected but have substantially no lateralmovement relative to one another along the axis of rotation.